IDEA-161259 Add Java-8 migration to use Collection.removeIf() where appropriate

java/java-tests/testData/inspection/java8CollectionsApi/afterIteratorRemoveFor.java

@@ -0,0 +1,8 @@
+// "Replace the loop with Collection.removeIf" "true"
+import java.util.*;
+
+public class Main {
+  public void removeEmpty(List<String> list) throws Exception {
+      list.removeIf(String::isEmpty);
+  }
+}

java/java-tests/testData/inspection/java8CollectionsApi/afterIteratorRemoveWhile.java

@@ -0,0 +1,9 @@
+// "Replace the loop with Collection.removeIf" "true"
+import java.util.*;
+
+public class Main {
+  public void removeEmpty(List<String> list) throws Exception {
+      // remove empty
+      list.removeIf(String::isEmpty);
+  }
+}

java/java-tests/testData/inspection/java8CollectionsApi/beforeIteratorRemoveFor.java

@@ -0,0 +1,13 @@
+// "Replace the loop with Collection.removeIf" "true"
+import java.util.*;
+
+public class Main {
+  public void removeEmpty(List<String> list) throws Exception {
+    f<caret>or(Iterator<String> it = list.iterator(); it.hasNext();) {
+      String str = it.next();
+      if(str.isEmpty()) {
+        it.remove();
+      }
+    }
+  }
+}

java/java-tests/testData/inspection/java8CollectionsApi/beforeIteratorRemoveWhile.java

@@ -0,0 +1,15 @@
+// "Replace the loop with Collection.removeIf" "true"
+import java.util.*;
+
+public class Main {
+  public void removeEmpty(List<String> list) throws Exception {
+    Iterator<String> it = list.iterator();
+    while<caret>(it.hasNext()) {
+      String str = it.next();
+      // remove empty
+      if(str.isEmpty()) {
+        it.remove();
+      }
+    }
+  }
+}

java/java-tests/testData/inspection/java8CollectionsApi/beforeIteratorRemoveWhileReused.java

@@ -0,0 +1,16 @@
+// "Replace the loop with Collection.removeIf" "false"
+import java.util.*;
+
+public class Main {
+  public void removeEmpty(List<String> list) throws Exception {
+    Iterator<String> it = list.iterator();
+    while<caret>(it.hasNext()) {
+      String str = it.next();
+      // remove empty
+      if(str.isEmpty()) {
+        it.remove();
+      }
+    }
+    it = list.iterator();
+  }
+}